.test{
    width: 15px;
    height: 200px;
    overflow: auto;
    float: left;
    margin: 5px;
    border: none;
}
.scrollbar{
    width: 15px;
    height: 200px;
    margin: 0 auto;
    border: none;

}
.test-1::-webkit-scrollbar {/*滚动条整体样式*/
    width: 7px;     /*高宽分别对应横竖滚动条的尺寸*/
    height: 1px;
    border: none;
}
.test-1::-webkit-scrollbar-thumb {/*滚动条里面小方块*/
    border-radius: 5px;
    -webkit-box-shadow: inset 0 0 5px rgba(0,0,0,0.1);
    background: rgba(123,236,255,0.3);
    border: none;
}
.test-1::-webkit-scrollbar-track {/*滚动条里面轨道*/
    -webkit-box-shadow: inset 0 0 5px rgba(0,0,0,0);
    border-radius: 5px;
    background: transparent;
    border: none;
}